Huawei AR1200 Series Configuration Guide

Configuration Roadmap
The configuration roadmap is as follows:
1. Set up the MP-EBGP peer relationship between PEs in different ASs and configure the
maximum hops between PEs.
2. Configure the routing policy on the ASBR: Assign MPLS labels to the loopback routes
with MPLS tokens received from the PE in the local AS before advertising the routes to
the remote ASBR; Assign new MPLS labels to the routes advertised to the PE in the local
AS if they are labeled IPv4 routes.
3. Configure the PE and the ASBR of the local AS to exchange the labeled IPv4 route.
4. Configure the ASBR and the peer ASBR to exchange the labeled IPv4 route.
Data Preparation
To complete the configuration, you need the following data:
l MPLS LSR-ID of the PE and the ASBR
l The VPN instance configured on the PE, RD and the VPN-target
l Routing policies configured on the ASBR
Procedure
Step 1 Configure IGP on the MPLS backbone of AS 100 and AS 200 respectively to make the PE and
the ASBR can reach each other in the same AS.
OSPF is used as IGP in this example, and the configuration procedure is not mentioned here.
NOTE
The 32-bit loopback interface address used as the LSR ID should be advertised by OSPF.
After the configuration, the OSPF neighbor relationship should be established between the
ASBR and the PE of the same AS. Run the display ospf peer command to find the status of the
OSPF neighbor relationship as "Full".
Take PE1 as an example.
<PE1> display ospf peer
OSPF Process 1 with Router ID 1.1.1.9
Neighbors
Area 0.0.0.0 interface 172.1.1.2(GigabitEthernet1/0/0)'s neighbors
Router ID: 2.2.2.9 Address: 172.1.1.1
State: Full Mode:Nbr is Master Priority: 1
DR: None BDR: None MTU: 0
Dead timer due in 31 sec
Neighbor is up for 00:28:11
Authentication Sequence: [ 0 ]
The ASBR and the PE in the same AS can learn Loopback addresses of each other and can ping
through each other.
Step 2 Configure MPLS basic capability and MPLS LDP on the MPLS backbone of AS 100 and AS
200 respectively to setup LDP LSP.
For configuration procedures, see Example for Configuring Inter-AS VPN Option A.
Step 3 Set up the IBGP peer relationship between the PEs and the ASBRs in the same AS.
Huawei AR1200 Series Enterprise Routers
Configuration Guide - VPN 3 BGP MPLS IP VPN Configuration
Issue 01 (2012-04-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
191

Huawei AR1200 Series Specifications

General

Brand	Huawei
Model	AR1200 Series
Category	Network Router
Language	English